Answer:
9*10^10/ 3*10^8 = 300
Step-by-step explanation:
When the firecracker hits the ground, H(t) = 0.0 = -16t^2 + 90t + 160 Using the quadratic formula,t = (-90 +- sqrt(90^2 - 4(-16)(160))) / 2(-16)t = -1.42 ort = 7.04
The negative time is extraneous. Therefore,t = 7.04 s.
Seven Seconds is your answer!
6 divided by 2 and 1 forths is going to be 8 out of 3
4x=9xuy Jesus loves you and so do I